Scale Effects of the Specimen on Shear Strength of sand by Direct Shear Test

doi:10.15683/kosdi.2019.12.31.590

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2019 Vol.15, Issue 4 Preview Page Next Page

Research Article

Scale Effects of the Specimen on Shear Strength of sand by Direct Shear Test 직접전단시험에 의한 모래의 전단강도에서 시편의 크기효과: 김준석¹*ㆍ김지현²
Joon-Seok Kim¹*, Ji-Hyun Kim²; ¹Professor, Department of civil and envirnmental engineering, Chungwoon University, Incheon, Republic of Korea
²Graduate student Dept. of Civil Engineering, Chungwoon University, Incheon, Republic of Korea

31 December 2019. pp. 590-596

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Abstract

Purpose: An experimental study was conducted on the sand samples for the size effect of the test specimens, one of the problems of the direct shear test. Method: Jumunjin standard sand, a representative sand of Korea, was used as sand sample. The large direct shear test was performed to analyze the shear strength at 50%, 60%, 70%, and 80% relative density, and then the comparative results were compared with the test results of the small direct shear test. Result: It was analyzed that the internal friction angle of the small shear tester tended to be relatively large in the dense region. It was analyzed that the results of the large shear tester tend to be relatively large in the region of medium relative density. Conclusion: The size effect on the samples in the direct shear test on sandy soil was analyzed to be relatively small.

Keywords

Direct shear test

Standard sand

Relative density

Size effect

Internal friction angle

연구목적: 직접전단시험의 문제점 중에 하나인 시험시편의 크기효과에 대하여 모래시료를 대상으로 실험적 연구를 수행하였다. 연구방법: 우리나라를 대표하는 모래인 주문진 표준사를 연구 대상으로 사용하였다. 상대밀도 50%, 60%, 70%, 80%에 대한 전단강도를 분석하기 위하여 대형직접전단시험을 수행한 후 소형직접전단기의 시험결과와 비교분석을 수행하였다. 연구결과: 상대밀도가 촘촘한(dense) 영역에서는 소형전단시험기의 내부마찰각이 비교적 큰 경향이 있는 것으로 분석되었다. 상대밀도가 중간(medium)정도의 영역에서는 대형전단시험기의 결과가 비교적 큰 경향이 있는 것으로 분석되었다. 결론: 모래흙에서 직접전단시험의 시료에 대한 크기 효과는 비교적 크지 않은 것으로 분석되었다.

키워드

직접전단시험

표준사

상대밀도

크기효과

내부마찰각

References

Hong,Y.H., Byen,Y.H., Chai,J.G., Lee, J.S. (2015). "Shear Behavior of Sand Samples According to the Type of Shear Box in the Direct Shear Test" Journal of Korean Geotechnical Society, Vol. 31, No. 3, pp. 51-52.10.7843/kgs.2015.31.3.51
Jewell, R.A. (1989). "Direct Shear Test On Sand", Geotechnique, Vol. 39, No. 2, pp. 309-322.10.1680/geot.1989.39.2.309
Ju, J.W., Park, C.S., Choi, H.-N. (1998). "Triaxial test of Jumunjin standard sand according to relative density", Korean Society of Civil Engineers Conference, Vol. 2, pp. 73-76.
Kim, J.G., Choi, Y.H., Jung, J.Y., Kang, K.S. (2000). "Study on Shear Constants of Jumunjin Standard sand According to Direct Shear Test Type", Korean Society of Civil Engineers Conference, Vol. 2, pp. 439-442.
Kim, H.G. (2015). "A Study on Shear Strength of Sand Using Large Shear Test", Chungwoon University Master's Thesis, Incheon, Korea
Lee, S.D. (2017). "Soil mechanics" Gumi Library, pp. 239-292

Information

Publisher :The Korean Society of Disaster Information
Publisher(Ko) :한국재난정보학회
Journal Title :Journal of the Society of Disaster Information
Journal Title(Ko) :한국재난정보학회논문집
Volume : 15
No :4
Pages :590-596
DOI :https://doi.org/10.15683/kosdi.2019.12.31.590

[1] Hong,Y.H., Byen,Y.H., Chai,J.G., Lee, J.S. (2015). "Shear Behavior of Sand Samples According to the Type of Shear Box in the Direct Shear Test" Journal of Korean Geotechnical Society, Vol. 31, No. 3, pp. 51-52.10.7843/kgs.2015.31.3.51

[2] Jewell, R.A. (1989). "Direct Shear Test On Sand", Geotechnique, Vol. 39, No. 2, pp. 309-322.10.1680/geot.1989.39.2.309

[3] Ju, J.W., Park, C.S., Choi, H.-N. (1998). "Triaxial test of Jumunjin standard sand according to relative density", Korean Society of Civil Engineers Conference, Vol. 2, pp. 73-76.

[4] Kim, J.G., Choi, Y.H., Jung, J.Y., Kang, K.S. (2000). "Study on Shear Constants of Jumunjin Standard sand According to Direct Shear Test Type", Korean Society of Civil Engineers Conference, Vol. 2, pp. 439-442.

[5] Kim, H.G. (2015). "A Study on Shear Strength of Sand Using Large Shear Test", Chungwoon University Master's Thesis, Incheon, Korea

[6] Lee, S.D. (2017). "Soil mechanics" Gumi Library, pp. 239-292

Journal of the Society of Disaster Information ISSN:1976-2208(Print) 2671-5287(Online) 한국재난정보학회논문집

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